Problem Formulation and Solution Overview This article will show you how to save a flat-text file to another folder in Python. At some point, you may need to write the contents of a flat-text file from one location to another. This can be done in various ways, as shown below in our examples. For this … Read more
Some time ago, we discovered how to send an email with Python using smtplib, a built-in email module. Back then, the focus was made on the delivery of different types of messages via SMTP server. Today, we prepared a similar tutorial but for Django. This popular Python web framework allows you to accelerate email delivery … Read more
⚔️ Programming Challenge: Given an integer n that could be very high (e.g., n=1000000). How to initialize a Python dictionary of size n that is fast, easy, and efficient? Next, you’ll learn the five main ways to solve this and compare their performance at the end of this article. Interestingly, the winner Method 4 is … Read more
Basic Solution To create a set of n elements, pass a list or another iterable of n initial elements into the set() function. For example, set(range(n)) creates the set of n consecutive integers {1, 2, …, n-1}. You can then add and remove the elements using the normal set methods such as add() or pop(). … Read more
Coding Challenge ⚔️ Challenge: Given an integer d representing the number of digits. How to create a random number with d digits in Python? Here are three examples: my_random(2) generates 12 my_random(3) generates 389 my_random(10) generates 8943496710 I’ll discuss three interesting methods to accomplish this easily in Python—my personal favorite is Method 2! Shortest Solution … Read more
In data science, you will need to learn how to generate random numbers, which in Python, we can do with the random module. In this tutorial, you’ll learn how to solve the following programming challenge: ⚔️ Challenge: How to do random sampling from a list in Python? Without further ado, let’s dive right into it! … Read more
Problem Formulation and Solution Overview This article will show you how to change tuple values in Python. To make it more interesting, we have the following running scenario: Eddie, the Meteorologist at NTCV, has calculated an incorrect five (5) Day weather forecast. These values are saved as a Tuple and require updating. 💬 Question: How … Read more
Problem Formulation 💬 Programming Challenge: Given a dictionary where the values are lists of varying sizes. Find and return the shortest list! Here’s an example: Also, you’ll learn how to solve a variant of this challenge. 💬 Bonus challenge: Find only the key that is associated with the shortest list in the dictionary. Here’s an … Read more
A Time Series is essentially a tabular data with the special feature of having a time index. The common forecast task is ‘knowing the past (and sometimes the present), predict the future’. This task, taken as a principle, reveals itself in several ways: in how to interpret your problem, in feature engineering, and in which … Read more
Problem Formulation 💬 Programming Challenge: Given a list of lists (nested list). Find and return the shortest inner list from the outer list of lists. Here are some examples: [[1], [2, 3], [4, 5, 6]] 👉 [1] [[1, [2, 3], 4], [5, 6], [7]] 👉 [7] [[[1], [2], [3]], [4, 5, [6]], [7, 8, 9, … Read more
Problem Formulation 💬 Programming Challenge: Given a dictionary where the values are lists of varying sizes. Find and return the longest list! Here’s an example: Also, you’ll learn how to solve a variant of this challenge. 💬 Bonus challenge: Find only the key that is associated with the longest list in the dictionary. Here’s an … Read more
Problem Formulation and Solution Overview 💡 This article will show you how to delete a line from a file in Python. To make it more interesting, we have the following running scenario: Rivers Clothing has a flat text file, rivers_emps.txt containing employee data. What happens if an employee leaves? They would like you to write … Read more